A forest fire burns down all of the trees in a large forest. The animals that lived in the trees are forced to move down to other areas. What kind of disturbance is this?

Correct answer: D). Catastrophic
A catastrophe is a disaster, It is a Greek word it is originally referred to as the disastrous finish of a dram or a tragedy. it is a form of disturbances that destroy most of the trees, and it also destroys all the seedlings and sampling in case of fires and flooding.
Example of Catastrophic events includes tsunami, earthquake, and hurricane etc.